table {
    width: 400px;
    margin: 100px auto;
    text-align: center;
    border-collapse: collapse;
}
thead tr {
    height: 30px;
    background-color: skyblue;
}
tbody tr {
    height: 30px;
}
thead td {
    font-size: 18px;
    color: white;
}
tbody td {
    border-bottom: 1px solid #d7d7d7;
    font-size: 12px;
    color: blue;
}